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Robert A Mosier

Robert A Mosier

Practice areas:

Defective and Dangerous Products, Medical Malpractice, Wrongful Death, Brain Injury

Client reviews

Not yet reviewed

About Me

Robert A. Mosier is a trial lawyer and managing partner of Sanders Phillips Grossman, LLC's California office. Mr. Mosier’s practice is focused on representing plaintiffs harmed by pharmaceutical and medical device companies. Mr. Mosier is a speaker at national legal conventions on issues involving mass tort litigation.  Mr. Mosier is an AV Preeminent Attorney, member of the Million Dollar Advocates Forum, an Arizona Top Rated Attorney – Top Trial Lawyers in America, National Trial Lawyers – Top 100. He is licensed in California, New York and Arizona.


Photos and Videos

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Practice Areas

Licensed since 1993

  1. Defective and Dangerous Products: 50%
  2. Medical Malpractice: 30%
  3. Brain Injury: 10%
  4. Wrongful Death: 10%



Free Consultation (30 minutes)

Payment Types:

Check, Credit Card

Attorney Endorsements

4 total 

  • Joseph Glenn Higuera

    Mr Mosier is an exceptional medical malpractice lawyer. He was an opposing counsel on a matter I handled many years ago. I was very impressed with his litigation skills and professionalism. I give him my highest recommendation if you are looking for a great malpractice attorney.


    Joseph Higuera Motorcycle Accident Attorney
    Relationship: Opposing Counsel on matter

  • Daniel Martin Hodes

    I endorse this lawyer.


    Daniel Hodes Medical Malpractice Attorney
    Relationship: Co-worker

Contact Info


2860 Michelle Drive
Suite 220
Irvine, CA, 92606


2101 Rosecrans Avenue
Suite 3290
El Segundo, CA, 90245




NYCurrently registered 201403/13/2015
AZActive 200407/30/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.

Avvo Contributions

Legal Answers


Award NameGrantorDate Granted
Best Lawfirms - Personal Injury Litigation - Orange CountyUS News & Best Lawyers2013
AV Rated PreeminentMartindale-Hubbell2012
Arizona Top Rated LawyerArizona Top Rated Lawyer2012
AV Rated PreeminentMartindale-Hubbell2011
Arizona Top Rated LawyerArizona Top Rated Lawyer2011
AV RatedMartindale-Hubbell2010
AV RatedMartindale-Hubbell2007
AV RatedMartindale-Hubbell2006
AV RatedMartindale-Hubbell2005
AV RatedMartindale-Hubbell2004
AV RatedMartindale-Hubbell2003
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2002
Million Dollar AdvocateMillion Dollar Advocates Forum - The Top Trial Lawyers in America2001

Work Experience

TitleCompany NameDuration
PartnerSanders Phillips Grossman, LLC.2013 - Present
Managing PartnerMcGregor & Mosier, APC1999 - 2012
AttorneyBonne, Bridges, Mueller, O'keefe & Nichols1995 - 1998
AttorneyBriggs & Alexander1993 - 1995


Association NamePosition NameDuration
Arizona Trial Lawyers AssociationN/AN/A
Arizona Association for JusticeN/AN/A
Orange County Trial Lawyers AssociationN/AN/A
Consumer Attorneys of CaliforniaN/AN/A
American Association for JusticeLeaders ForumN/A
OCBA/OCMA Liaison CommitteeVice ChairN/A

Legal Cases

Case NameOutcome
Walker v Kiousis 93 Cal.App. 4th 1432We prevailed. Court found the law was an unconstitutional violation of the right to free speech.
Neal v. Superior Court 90 Cal. App. 4th 22We prevailed. Trial court was overturned and husband ordered to pay wife's costs and fees.
Arana v. OCTA$2.5 Million

See all Legal Cases 


Publication NameTitleDate
The BulletinConduct In The Operating Room: Physicians Watch Out.N/A
The Gavel (OCTLA)Willful, Malicious, Oppressive and Intentional Injury JudgementsN/A


School NameMajorDegreeGraduated
Thomas Jefferson School of LawLawJD - Juris Doctor1992
Thomas Jefferson School of LawLawMS - Master of Science1990

Speaking Engagements

Conference NameTitleDate
OCBA/OCMA ConferenceSexual Harassment and New Liability for Physicians1998
OCBA/OCMA ConferenceMedical Committee Privileges - What you don't know will harm you1997
Resident Lecture SeriesDocumentation and CommunicationN/A
Resident Lecture SeriesDocumentation and CommunicationN/A
Resident Lecture SeriesDocumentation and CommunicationN/A
Lecture SeriesThe Patient's Right to DieN/A
Lecture SeriesThe Patient's Right to DieN/A
Lecture SeriesThe Patient's Right to DieN/A
Estate PlanningDurable Financial Powers of Attorney - Giving up control?N/A
Estate PlanningAdvanced Health Care Directives and YouN/A
Estate PlanningDurable Power of Attorneys for Health CareN/A
Estate PlanningLiving Wills and TrustsN/A
Estate PlanningLiving Wills - end of life decisionsN/A